Citation: Jian-Hua Li, Hui Zheng, Hua-Xiang Lin, Bo-Xin Zhang, Jia-Bin Wang, Tong-Lei Li, Qi-Qing Zhang. Preparation of Three Dimensional Hydroxyapatite Nanoparticles/Poly(vinylidene fluoride) Blend Membranes with Excellent Dye Removal Efficiency and Investigation of Adsorption Mechanism[J]. Chinese Journal of Polymer Science, ;2019, 37(12): 1234-1247. doi: 10.1007/s10118-019-2271-7 shu

Preparation of Three Dimensional Hydroxyapatite Nanoparticles/Poly(vinylidene fluoride) Blend Membranes with Excellent Dye Removal Efficiency and Investigation of Adsorption Mechanism

a.
Institute of Biomedical and Pharmaceutical Technology, Fuzhou University, Fuzhou 350001, China
b.
State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350116, China
c.
Department of Industrial and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47906, USA

Corresponding author: Jian-Hua Li, jhli_2005@163.com
Received Date: 7 March 2019
Accepted Date: 8 April 2019
Available Online: 6 June 2019

In this work, poly(vinylidene fluoride) (PVDF) membranes with hydrophilicity as well as preeminent mechanical strength and dye removal efficiency were fabricated by blending with three dimensional hydroxyapatite nanoparticles (HAPNPs). Surface chemical composition and morphology of the prepared membranes were systematically investigated by ATR-FTIR, XPS, XRD, FESEM, and EDS mapping analyses. The results verified that a large number of HAPNPs were successfully embedded on the modified membrane cross-sections. Moreover, HAPNPs content in the casting solution is an important factor that could have profound influence on the structures and performances of PVDF/HAPNPs blend membranes. The optimal membrane M2 with 2 wt% HAPNPs exhibited excellent hydrophilicity, outstanding mechanical strength of 19.60 MPa, and high water flux of (2466 ± 31) L·m^–2·h^–1. The maximum static adsorption capacity of the optimal membrane was about 10.83 mg/g, which is 3.75 times that of the pristine PVDF membrane (2.89 mg/g). PVDF/HAPNPs membranes were not only utilized for static adsorption, but also applied to dynamic dye removal. The possible adsorption mechanism between Congo red (CR) and HAPNPs embedded on the blend membranes was firstly discussed in this work. HAPNPs interacted with CR via Lewis reaction, hydrogen bond interaction, as well as electrostatic attraction to achieve the adsorption effect. Herein, the PVDF/HAPNPs blend membranes with extraordinary hydrophilicity, mechanical strength, and dye removal efficiency possess tremendous potential for practical applications of wastewater treatment.
- Three dimensional hydroxyapatite nanoparticles,
- PVDF/HAPNPs blend membranes,
- Mechanical strength,
- Dynamic dye removal,
- Adsorption mechanism
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沈阳化工大学材料科学与工程学院沈阳 110142